Short answer: no.
Long(er) answer: she can strike at you whenever she wants. She has that ability. Every animal with teeth (or a mouth) can bite.But unless you ONLY open the cage to feed, the chances of her mistaking your clean, dry hand for food... I just don't see it.
Handlers do get bitten and mistaken for food, but that is often with a mouse or rat scent on their hands. Snakes are instinctual, but have good "resources" for hunting. Ball pythons specifically have heat pits and can sense minute differences between you and its food.
I don't know if I'm explaining this well enough, so I hope someone already has and I missed reading it in the comments. Or maybe someone better at explaining and with more experience will come along!
To answer your original question. I wouldn't let her/him go. They can be quick. If you are new or newish to snakes, then that's really a chance I think. I used to let one of my snakes crawl around on the back of a wire chair when she was smaller, but as soon as she hit the floor I picked her up.
You can never really trust reptiles, or animals in general. Or people. Don't trust anyone.
Kidding![]()
But my suggestion is to get to know your snake's personality and patterns for quite awhile before you do anything too adventurous like taking her/him outside, or letting them roam further than you have.